Marine Investigation Report M98M0003
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MARINE INVESTIGATION REPORT M98M0003 ACCIDENT ABOARD SHIP FISHING VESSEL ACAPE CHIDLEY@ 105 MILES EAST OF LOUISBOURG, NOVA SCOTIA 3 FEBRUARY 1998 The Transportation Safety Board of Canada (TSB) investigated this occurrence for the purpose of advancing transportation safety. It is not the function of the Board to assign fault or determine civil or criminal liability. Marine Investigation Report Accident Aboard Ship Fishing Vessel ACAPE CHIDLEY@ 105 miles east of Louisbourg, Nova Scotia 3 February 1998 Report Number M98M0003 Summary Before daybreak, the stern trawler ACAPE CHIDLEY@ was fishing off the coast of Nova Scotia when the crew experienced difficulty in retrieving the trawl net. During an attempt to clear a riding turn of gilson wire on a winch drum, a trawlerman positioned himself near a block which was rigged to help pull the gilson wire free. As the pulling force was increased, the block assembly tore from its corroded support and struck the trawlerman, killing him. Ce rapport est également disponible en français. - 2 - Other Factual Information "CAPE CHIDLEY" Port of Registry Halifax, Nova Scotia (N.S.) Flag Canada Registry/Licence Number 370542 Type Large Fishing Vessel Gross Tonnage1 792 Length 42.73 m Built 1976 Propulsion 2400 brake horsepower Number of Crew 14 Registered Owner National Sea Products Limited, Lunenburg, N.S. The ACAPE CHIDLEY@ is a large stern trawler of steel construction with the wheelhouse and accommodation forward and a mechanised working deck over the fish hold aft. A forward gantry straddles a winch platform just aft of the wheelhouse. The after gantry, which stands astride the stern ramp, houses the port and starboard gallows frames, towing blocks, and trawl door stowage. The vessel had been engaged to catch fish for the French island of Saint-Pierre. On 2 February 1998 at 1010 the trawler departed Saint-Pierre bound for the fishing grounds off the coast of Nova Scotia. Just before daybreak on February 3, the ACAPE CHIDLEY@ was trawling approximately 105 miles from the coast, east of Louisbourg, when the crew experienced difficulty in retrieving the trawl net. Both trawl doors had been hauled up and secured at each port and starboard gallows frame when the hammer lock (steel coupling) at the port door let go, releasing the end of the sweep line pennant. This meant that the sweep lines from the trawl door to the net could not be harnessed using the pennant in the normal way for bringing the net on board. 2 In order to correct the situation, the port trawl door had to be manoeuvred from the gallows frame and brought on deck to capture the free end of the pennant for normal net retrieval. 1 Units of measurement in this report conform to International Maritime Organization standards or, where there is no such standard, are expressed in the International System of units. 2 The pennant is a wire cable with one end attached to the net=s sweep lines and the other secured at the trawl door with a releasable hammer lock. The pennant at each door is used to transfer the sweep lines and net from the trawl doors for independent hauling of the net on deck via the stern ramp. - 3 - The master had approximately 27 years= working experience with National Sea Products of Lunenburg. He was relatively new to this vessel, having sailed on her for three trips. He had asked the chief mate to remain on the bridge to demonstrate the procedure used on board this vessel for retrieving the trawl door. Using the gilson winch and cable over the gilson block at the head of the forward gantry, the crew attempted to lead the cable aft to the port trawl door. When slackening-off the gilson cable by rotating the winch drum, a riding turn of wire on the gilson drum jammed the cable and prevented it from being hauled out by hand. The capstan winch was then used to forcibly clear the riding turn of cable on the gilson drum (see Appendix A - Arrangement of Cable, Rope and Blocks). In order to free the jammed cable, a rope was harnessed to the end of the gilson cable. It was then led through an overhead guide block at the top of the port gallows frame, down through a yo-yo block with a working limit of five tons, attached at the aft bulwark, and led to a capstan winch located on the port side of the afterdeck. The master warned all hands to stand clear as the cables and rope under strain ran the full length of the working deck. There was partial success in clearing the riding turn on the gilson drum and this provided some additional cable aft for eventual hook up to the port trawl door. The process to free the cable from the drum was such that there were times of maximum strain on the capstan winch and others when the cable would go slack as it was being cleared. The trawlerman went aft to handle the required slack in the gilson cable and to hook it onto the port trawl door. This placed him immediately in front of the yo-yo block and approximately 2 m from the capstan winch operator. There was no communication between them. The crew member who was operating the capstan winch continued to take the strain on the cable as it became slack. At a coincident moment when the strain was being taken, and the trawlerman was immediately in front of the block, a section of the bulwark stay in way of the block ripped away from the after ship=s structure. The five-ton block, together with its safety chain and the lug, hit the trawlerman on the left side of his lower jaw and he fell to the deck. The trawlerman, who had approximately seven years= fishing experience, was wearing a Canadian Standards Association-approved hard hat at the time. The master rushed down to the afterdeck from the wheelhouse to determine the status of the trawlerman. Unable to get a pulse, the master, via the ship=s radio and a Canadian Coast Guard radio station, was able to communicate with a doctor ashore. Together they determined that the trawlerman was deceased. The vessel initially steamed for North Sydney and subsequently changed course for Louisbourg, where representatives from National Sea Products and other interested authorities including the RCMP and Nova Scotia=s Department of Environment and Labour,3 met the vessel. 3 Formerly called Department of Labour. - 4 - Block Securing Arrangement The bulwark was stiffened by bulwark stays which comprised 12.7 cm x 7.62 cm x 0.95 cm inverted ordinary angle irons (see Appendix B - Photographs). The long flange of the angle iron (the standing flange) was at right angles and welded onto the bulwark. The face flange was parallel to the bulwark and had a pad-eye and a lug welded to it, which were used for securing blocks during fishing operations. Of the two rigging attachments, the one near the upper end was a lug and the other, approximately 12.5 cm below it, was a pad-eye. The general practice was to shackle the yo-yo block to the lower pad-eye and secure the safety chain to the upper lug. In this instance, both the yo-yo block and the safety chain were shackled to the upper lug. Post-Occurrence Examination Following the occurrence, the accident site was examined; observations included the following: $ The face flange of the bulwark stay in way of the upper lug to which the yo-yo block was secured was severely corroded, wasted, and bent beyond the original 90-degree angle; this was particularly noticeable in the area of the upper rigging attachment. $ Other bulwark stays on the after deck, which were used for similar purposes, were in like condition and some had holes cut in the standing flange to take the block safety chain. $ The open link safety chain for the yo-yo block in use had one partially wasted link. TSB Engineering Laboratory The Engineering Laboratory of the TSB conducted an examination and in-depth analysis of the bulwark stay and the lug to which the yo-yo block was fastened, and the conclusions drawn included the following:4 $ The fracture occurred in the angle iron. $ No metallurgical defects were found in the weld nor was it considered to have adversely affected the strength of the adjacent metal. $ The strength of the fractured structure at the time of the failure was roughly of the same magnitude as the maximum pull of the winch. The pull of the winch combined with the dynamic loading effects were such that the weakened section of the bulwark stay failed. Regulatory Ship Inspection by Transport Canada 4 TSB Engineering Laboratory Report No. LP 039/98 - Examination of Fractured Lug is available upon request from the Transportation Safety Board of Canada. - 5 - Periodic inspection of the external and internal hull of the vessel was carried out by a Transport Canada, Marine Safety (TCMS) surveyor on 16 January 1998, some two weeks before the occurrence. Following inspection, the vessel was issued an unqualified ship inspection certificate. The record indicates that no SI-7 was issued to the vessel; SI-7s identify deficiencies that do not materially affect the seaworthiness of the vessel but, being safety-related, are required to be rectified as soon as possible or within a period indicated on the certificate. Occupational Health and SafetyCWorkplace Legislation and Training The Occupational Health and Safety Act (1996) of Nova Scotia and the regulations made pursuant thereto apply to the work deck space aboard fishing vessels.